Delete last row in database?
How do I delete last row in mysql database? I tried like this without luck:
public void minus()
int tal=0;
try{
ResultSet row = db.select("select * from midlertidigregning order by id asc");
row.last();
tal = row.getInt("nr");
}catch( SQLException t ){}
db.insert("delete from midlertidigregning where nr = '"+tal+"' limit 1");
}
What didn't work? Did something fail, or did the row not get deleted as expected? Did you issue a commit after the delete?
Similar Messages
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HOW TO DELETE THE ROW FROM DATABASE
hI,
Iam pasting my code below.My problem isi retrieve rows from database and display them in jsp page in rows.For each row there is delete hyperlink.Now when i click that link i should only delete the row corresponding to that delete link temporarily but it should not delete the row from database now.It should only delete the row from database when i click the save button.How can i do this can any one give some code.
thanks
naveen
[email protected]
<%@ page language="java" import="Utils.*,java.sql.*,SQLCon.ConnectionPool,java.util.Vector,java.util.StringTokenizer" %>
<html>
<head>
<meta http-equiv="Content-Language" content="en-us">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>Item Details</title>
<script>
function submitPage()
document.details.action = "itemdetails.jsp" ;
document.details.submit();
</script>
</head>
<body>
<form name="details" action="itemdetails.jsp" method="post">
<%
ConnectionPool pool;
Connection con = null;
Statement st;
ResultSet rs =null;
%>
<table border="0" cellpadding="0" cellspacing="0" width="328">
<tr>
<td width="323" colspan="4"><b>Reference No :</b> <input type="text" name="txt_refno" size="14">
<input type="submit" value="search" name="search" ></td>
</tr>
<tr>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Item Code</b></font></td>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Item No</b></font></td>
<td width="81" bgcolor="#000099"><font color="#FFFFFF"><b>Amount </b></font></td>
<td width="80" bgcolor="#000099"> </td>
</tr>
<%
pool= new ConnectionPool();
Utils utils = new Utils();
double total =0.00;
String search =utils.returnString(request.getParameter("search"));
if(search.equals("search"))
try
String ref_no =utils.returnString(request.getParameter("txt_refno"));
String strSQL="select * from ref_table where refno='" + ref_no + "' ";
con = pool.getConnection();
st=con.createStatement();
rs = st.executeQuery(strSQL);
while(rs.next())
String itemcode=rs.getString(2);
int item_no=rs.getInt(3);
double amount= rs.getDouble(4);
total= total + amount;
%>
<tr>
<td width="81"><input type=hidden name=hitem value=<%=itemcode%>><%=itemcode%></td>
<td width="81"><input type=hidden name=hitemno value=<%=item_no%>><%=item_no%></td>
<td width="81"><input type=hidden name=hamount value=<%=amount%>><%=amount%></td>
<td width="80"><a href="delete</td>
</tr>
<%
}catch(Exception e){}
finally {
if (con != null) pool.returnConnection(con);
%>
<tr>
<td width="323" colspan="4">
<p align="right"><b>Total:</b><input type="text" name="txt_total" size="10" value="<%=total%>"></td>
</tr>
<tr>
<td width="323" colspan="4">
<input type="button" value="save" name="save"></td>
</tr>
</table>
</form>
</body>
</html>You mean when you click on the hyperlink you want that row to disappear from the page, but not delete the row from the database until a commit/submit button is pressed?
Personally, I think I'd prefer that you have a delete checkbox next to every row and NOT remove them from the display if I was a user. You give your users a chance to change their mind about their choice, and when they're done they can see exactly which rows will be deleted before they commit.
You know your problem, of course, so you might have a good reason for designing it this way. But I'd prefer not removing them from the display. JMO - MOD -
Use Preparedstatement to delete several rows from database
Hello everyone,
I am trying to delete multiple rows from database at one time using Preparedstatement.
It works well when I tried in SQL directly,the sql query is as follows:
delete from planners_offices where planner ='somename' and office in ( 'officeone', 'officetwo', 'officethree')
I want to delete those 3 rows at one time.
But when I am using preparedstatement to implement this function, it does not work. It did not throw any exception, but just does not work for me, the updated rows value always returns "0".
Here is my simplified code:
PreparedStatement ps = null;
sqlStr = " delete from PLANNERS_OFFICES where planner = ? and office in (?) "
Connection con = this.getConnection(dbname);
try
//set the sql statement into the preparedstatement
ps = con.prepareStatement(sqlStr);
ps.setString(1,"somename");
ps.setString(2,"'officeone','officetwo','officethree'");
int rowsUpdated =ps.executeUpdate();
System.out.println(rowsUpdated);
//catch exception
catch (SQLException e)
System.out.println("SQL Error: " + sqlStr);
e.printStackTrace();
catch (Exception e) {
e.printStackTrace();
} finally {
this.releaseConnection(dbname, con);
try{
ps.close();
}catch (SQLException e){
e.printStackTrace();
rowsUpdated always give me "0".
I tried only delete one record at one time, "ps.setString(2, "officeone");", it works fine.
I am guessing the second value I want to bind to the preparedstatement is not right, I tried several formats of that string, it does not work either.
Can anyone give me a clue?
Thanks in advance !
Rachelthe setString function in a preparedStatement doesn't just do a replace with the question mark. It is doing some internal mumbojumbo(technical term) to assign your variable to the ?.
If you are looking to do your statement, then you will need to put in the correct of # of question marks as you need for the in clause.
delete from PLANNERS_OFFICES WHERE PLANNER = ? and office in (?,?,?)
If you need to allow for one or more parameters in your in clause, then you will need to build your SQL dynamically before creating your prepared statement.
ArrayList listOfOfficesToDelete ;
StringBuffer buffer = new StringBuffer("DELETE FROM PLANNERS_OFFICES WHERE PLANNER = ? AND OFFICE IN (");
for(int i = 0; i < listOfOfficesToDelete.size(); i++ )
if( i != 0 )
buffer.append(",");
buffer.append("?");
buffer.append(")");
cursor = conn.prepareStatement( buffer.toString() );
cursor.setString(1, plannerObj);
for(int i = 0; i < listOfOfficesToDelete().size(); i++ )
cursor.setString(i+1, listOfOfficesToDelete.get(i) );
cursor.executeUpdate() ; -
Delete Last Row in Matrix on SBO 2005
Hi,
Im using SAPB1 2005 SP1 with B1DE.
I've seen a post that indicates that the following code should delete a row from a matrix (even the last row) when using SBO 2005
I still find that all rows except last row of matrix are removed from the database.
<b>How do I delete the last row from the Del button event handler????</b>
I'm using
<i> [B1Listener(BoEventTypes.et_CLICK, false)]
public virtual void OnAfterClick(ItemEvent pVal)
bool ActionSuccess = pVal.ActionSuccess;
Form form = B1Connections.theAppl.Forms.Item(pVal.FormUID);
Item item = form.Items.Item("del");
Button button = ((Button)(item.Specific));
// ADD YOUR ACTION CODE HERE ...
int row;
Matrix oMtx = (Matrix)form.Items.Item("mtx_0").Specific;
DBDataSource oDBDS = (DBDataSource)form.DataSources.DBDataSources.Item("@SD_POOLCONTRCT_LINE");
row = oMtx.GetNextSelectedRow(0, BoOrderType.ot_SelectionOrder);
oMtx.DeleteRow(row);
if (oMtx.RowCount == 0)
oDBDS.RemoveRecord(0);
if ((form.Mode != BoFormMode.fm_ADD_MODE) | (form.Mode != BoFormMode.fm_UPDATE_MODE))
form.Mode = BoFormMode.fm_UPDATE_MODE;
}</i>Hi Ben,
[B1Listener(BoEventTypes.et_CLICK, false)]
public virtual void OnAfterClick(ItemEvent pVal)
bool ActionSuccess = pVal.ActionSuccess;
Form form = B1Connections.theAppl.Forms.Item(pVal.FormUID);
Item item = form.Items.Item("del");
Button button = ((Button)(item.Specific));
// ADD YOUR ACTION CODE HERE ...
int row;
Matrix oMtx = (Matrix)form.Items.Item("mtx_0").Specific;
DBDataSource oDBDS = (DBDataSource)form.DataSources.DBDataSources.Item("@SD_POOLCONTRCT_LINE");
Rest of your code will remain same.
I am making the modification here. I am using the RowCount property that gives me the address of the last row of the matrix.
<b>row = oMtx.RowCount;</b>
Every time this will return you the last row and that row will be deleted.
<b>row = oMtx.RowCount;</b>
oMtx.DeleteRow(row);
if (oMtx.RowCount == 0)
oDBDS.RemoveRecord(0);
if ((form.Mode != BoFormMode.fm_ADD_MODE) | (form.Mode != BoFormMode.fm_UPDATE_MODE))
form.Mode = BoFormMode.fm_UPDATE_MODE;
Regards,
Prashant -
Problems deleting last row of table
I have tried a number of examples to make a button delete the LAST row of a table, but I cannot make it.
This is the script I am currently using, but it only delets the second row. I'm desperate, I don't know where's the mistake. Please help!
var sSubformSOM = "xfa.form.Summary.INTrack.INRecordTable.INRecord.Row1";
var bCalc = true;
var message = "You have reached the maximum number of items allowed.";
var oSubform = xfa.resolveNode(sSubformSOM);
var sParentSOM = oSubform.parent.somExpression;
var sManagerSOM = sParentSOM + "._" + oSubform.name;
var oManager = xfa.resolveNode(sManagerSOM);
var nMinCount = oManager.occur.min;
var nSubCount = oManager.count;
if (nSubCount > nMinCount) {
oManager.removeInstance(1);
if (bCalc == true) {
xfa.form.recalculate(1);
} else {
xfa.host.messageBox(message,"Remove Item", 3);Hi
In fact what you want is somehow strange. But this may be used.
For the first row:
<b>SELECT * FROM <table_name> UP TO 1 ROWS
INTO gs_record</b>
<i>*-- If you want you can use <b>"ORDER"</b> statement here to order *the contents</i><b>.</b>
For the last row:
As far as I know, You should select all the records till the last row and then get the last row.
But, I think without ordering it will be somehow weird. We do not deal how the database layer handles order of the table. It has different policies regarding indexes etc... If you have an ordering condition, I think it will often be more convenient using an internal table to handle data. That is, retrieve your data with SELECT statement into an internal table, sort it and read it.
*--Serdar -
Delete last row in a table - why won't it delete?
I cannot delete the last row in any of my tables. (InDesign CS2). The option is greyed out - is this by design or a bug and how can I delete it?
Thanks.No,
The table has two header rows and no footers. The row I cannot delete is the third row which must therefore be a body row. -
Delete last Public Folder Database
Hi, i have full Exchange 2010 deployment and one Exchange 2007 mailbox server that contains only one public folder database.
I dont have any public fodler databases on Exchange 2010 servers so there is only one public folder db in the whole organization residing in the last mailbox 2007 server.
my users are not using public folders and i have full web distributino OAB and im not using the public folder db for anything
I want to remove that one public folder database, but it gave me errors that there is some folder inside, when i dig inside the PF eirarchy, i can only see some system folders that i couldnt delete.
So is it safe if i use adsiedit to delete that PF database?
ammarhasayenWhen running :
Get-PublicFolder -Server <server containing the public folder database> "\" -Recurse -ResultSize:Unlimited | Remove-PublicFolder -Server <server containing the public folder database> -Recurse
i got :
emove-PublicFolder : Modification of the root folder '\' is not allowed.
At line:1 char:91
+ Get-PublicFolder -Server Host1 "\" -Recurse -ResultSize:Unlimited | Remove-PublicFolder <<<< -Server Host1 -Recurse
+ CategoryInfo : NotSpecified: (0:Int32) [Remove-PublicFolder], ModificationDisallowedException
+ FullyQualifiedErrorId : 9DFBF7E8,Microsoft.Exchange.Management.MapiTasks.RemovePublicFolder
Remove-PublicFolder : Cannot delete the object '\Internet Newsgroups'. Please make sure that you specified the correct identity and that you have the corr
At line:1 char:91
+ Get-PublicFolder -Server Host1 "\" -Recurse -ResultSize:Unlimited | Remove-PublicFolder <<<< -Server Host1 -Recurse
+ CategoryInfo : NotSpecified: (1:Int32) [Remove-PublicFolder], MapiPartialCompletionException
+ FullyQualifiedErrorId : F142C4A1,Microsoft.Exchange.Management.MapiTasks.RemovePublicFolder
ammarhasayen -
How to delete a row from database table in facade client
Hi all,
I followed the tutorial in creating a persistence entity from database table, then a session facade. Then I followed the tutorial to create a sample client to test the model. In the session facade, I could use persistEntity method to insert a record to the database. I am just thinking of an extension to the tutorial, i.e., being able to delete the record too. So I created a new method removeEntity in the session facade
public void removeEntity(Object entity) {
entity=em.merge(entity);
em.remove(entity);
em.flush();
and called it in the sample client. It was executed without any error, but the record in the table still exists.
I tried to look around for a solution, but I did not find one. Would anybody here please help out? Many thanks in advance!Hi Frank,
I tried the code snippet, but I got the following exception when executing this code:
javax.ejb.EJBException: EJB Exception: ; nested exception is:
java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.; nested exception is: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
at weblogic.deployment.BasePersistenceContextProxyImpl.validateInvocation(BasePersistenceContextProxyImpl.java:121)
at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:86)
at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:91)
at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:80)
at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:26)
at $Proxy141.getTransaction(Unknown Source)
at model.SessionEJBBean.removeEntity(SessionEJBBean.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:37)
at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:55)
at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:50)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy143.removeEntity(Unknown Source)
at model.SessionEJB_qxt9um_SessionEJBImpl.removeEntity(SessionEJB_qxt9um_SessionEJBImpl.java:142)
at model.SessionEJB_qxt9um_SessionEJBImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
javax.ejb.EJBException: EJB Exception: ; nested exception is:
java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.; nested exception is: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.unwrapRemoteException(RemoteBusinessIntfProxy.java:109)
at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.invoke(RemoteBusinessIntfProxy.java:91)
at $Proxy0.removeEntity(Unknown Source)
at model.SessionEJBClient.main(SessionEJBClient.java:71)
Caused by: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
at weblogic.deployment.BasePersistenceContextProxyImpl.validateInvocation(BasePersistenceContextProxyImpl.java:121)
at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:86)
at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:91)
at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:80)
at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:26)
at $Proxy141.getTransaction(Unknown Source)
at model.SessionEJBBean.removeEntity(SessionEJBBean.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:37)
at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:55)
at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:50)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at $Proxy143.removeEntity(Unknown Source)
at model.SessionEJB_qxt9um_SessionEJBImpl.removeEntity(SessionEJB_qxt9um_SessionEJBImpl.java:142)
at model.SessionEJB_qxt9um_SessionEJBImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Process exited with exit code 0. -
Problem in deleting row from database in table component
Hi,
I have a table component that its content change by diffrent links.
in this table i have a hyperlink in each row to deleting that row from dataBase.
so i must get the current row .
i do it like this:
define a rowset in the page that have a delete query :
delete from response where responseID=?
in action of delete hyperlink ,i have:
Integer responseId=(Integer)responseDataProvider.
getValue("#{currentRow.value['responseID']}") ;
getSessionBean1().getResponseRowSet().setObject(1,responseId);
getSessionBean1().getResponseRowSet().execute();
but in first line occure a exception:
illigalArgument #{currentRow.value['responseID']}
thanks.by using data table
first you should get current record (row that recived action)
then delete it by using data provider.
I do not think that you could execute delete statement using rowSets because they just can provide Select statements.
btw , following code will retrive clicked row from data table and
delete that row
try {
RowKey rk = getTableRowGroup1().getRowKey();
if (rk != null) {
testDataProvider.removeRow(rk);
testDataProvider.commitChanges();
} catch (Exception ex) {
log("ErrorDescription", ex);
error(ex.getMessage());
hth
masoud -
How to get the last row of a database table.
HI ,
I want to get record exactly from the last row of a database table.
How is that possible?Hi,
To fetch last record from an internal table, just do find the number of records in it and read using index.
DESCRIBE TABLE ITAB LINES L_LINES.
READ TABLE ITAB INDEX L_LINES.
You can also use LOOP .. ENDLOOP but the above method is better (performance wise).
using LOOP .. ENDLOOP.
LOOP AT ITAB.
**do nothing
ENDLOOP.
**process ITAB (Header record of ITAB).
**after ENLOOP, ITAB will have the last record of the internal table.
[here ITAB is internal table as well as header record.]
But what is the requirement?
If you are looking for the current record of an employee then you can use ENDDA = HIGH_DATE.
My advice is to review your requirement again and try to fetch only that record which you need.
Mubeen -
How to delete duplicate rows in oracle and retaining last duplicate rows
Hi,
I'm having millions of records in the table .Some duplicate values/rows are inserted in it.
I just want to delete duplicate rows but also want to retain the last duplicate row.
For eg if one record is found three times ,i want to delete first and second record and retain
the third one i.e the last inserted one.
Regards
Paramdeep Singhuser13310594 wrote:
Hi,
I'm having millions of records in the table .Some duplicate values/rows are inserted in it.
I just want to delete duplicate rows but also want to retain the last duplicate row.
For eg if one record is found three times ,i want to delete first and second record and retain
the third one i.e the last inserted one.Hi Paramdeep,
To start with, since you do not wish to keep multiple rows with same values, why allow them to get inserted in the first place?
Wouldn't it be easier to block duplicate rows from inserting by creating a Unique constraint on Column(s) that define a row as duplicate, then rather deleting duplicate rows periodically?
For deleting duplicate rows, there are N number of techniques available. Always remember, you need to have a rigid criteria that marks row as duplicate.
[url http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:15258974323143]this is one recomended by tom for large tables.
Vivek L -
How can I delete the last row of a Matrix
Hi All,
Does anyone know whether deleting the last row of a matrix controlled by a UDO child table gives problems? I have the strange effect that I cannot delete the very last existing row in the matrix, i.e. after updating the delete the last to-be deleted row comes back into my matrix !!
I give you a snippet of my code (function getSelectedRow gives the selected row in the matrix):
==
if (evnt.ItemUID.Equals(ViewConstants.Items.DELETEBUTTON))
if (evnt.EventType == BoEventTypes.et_ITEM_PRESSED)
if (evnt.BeforeAction)
form = BusinessOne.Application.Forms.Item(formUID);
mtx = (Matrix)form.Items.Item(ViewConstants.Items.MATRIX).Specific;
int numRow = getSelectedRow(mtx);
if (numRow != -1)
mtx.DeleteRow(numRow);
form.Mode = BoFormMode.fm_UPDATE_MODE;
Item btn = (Item)form.Items.Item(ViewConstants.Items.ADDBUTTON);
btn.Enabled = true;
==
Cheers,
Marcel Peek
Alpha One
Message was edited by: Marcel Peek
Message was edited by: Marcel PeekYes, there is a problem to delete the last row.
It is fixed in version 2005. -
Deleting a row from a database...
Here is the method I am calling to delete a row from a database. I keep getting this error, but I am not sure why.
Error: "Too few parameters. Expected 1."
//To delete a row
public void removeRow(String x, String y) {
try {
Statement stmt = con.createStatement();
//delete row with same x and y
//first is a string and second is a number
String query = "DELETE * FROM table WHERE first = '" +x+ "' AND " +
"second = " +Integer.parseInt(y);
int result = stmt.executeUpdate(query); //runs delete query, ERROR HERE *************
System.out.println("Test"); //debug statement, never gets here
//deletion confirmation message
JOptionPane.showMessageDialog(null, "Row deleted",
"Delete Reservation", JOptionPane.INFORMATION_MESSAGE);
catch (Exception e) { System.out.println(e); }Additionally, in the future you might want to use:
catch(SQLException sqlx) {
System.out.println( sqlx.getSQLState()
+"\t"+sqlx.getMessage()
+"\t"+sqlx.getErrorCode() );... It'll help with diagnostics.
☺Bill -
How to delete all rows data from database
Hello All.
I have a database username 'abc'. This database contain 123 tables & have many data.
I want to empty all the database. Is it possible that clear all the database with a single query.
if yes then kindly tell me about the query .
Thanks
DiamondKeep in mind that you cannot rollback the truncate command.
Once you truncate a table all of it's data AND statistics are gone.
If you do not want to use PL/SQL to delete all rows you can generate a script by SQL
SCOTT@ORCL> SELECT ' TRUNCATE TABLE '|| TABLE_NAME||';' FROM USER_TABLES;
'TRUNCATETABLE'||TABLE_NAME||';'
TRUNCATE TABLE BONUS;
TRUNCATE TABLE SALGRADE;
TRUNCATE TABLE DEPT_LOV;
TRUNCATE TABLE TITLE;
TRUNCATE TABLE TEST_DATE;
TRUNCATE TABLE DEPT;
TRUNCATE TABLE REP;
TRUNCATE TABLE REP_PARAM;
TRUNCATE TABLE EMP;
10 rows selected.
SCOTT@ORCL> SELECT 'DELETE FROM '|| TABLE_NAME||';' FROM USER_TABLES;
'DELETEFROM'||TABLE_NAME||';'
DELETE FROM BONUS;
DELETE FROM SALGRADE;
DELETE FROM DEPT_LOV;
DELETE FROM TITLE;
DELETE FROM TEST_DATE;
DELETE FROM DEPT;
DELETE FROM REP;
DELETE FROM REP_PARAM;
DELETE FROM EMP;
10 rows selected.
SCOTT@ORCL>You can save the output in a .sql file and run it.
Regards,
Tony -
Import the last row written in a database
Hello!
I want know what i have to do to import the last row written in a table from a MySQL database.
I'm using labview database toolkit.
Thank you in advanced.
LarsonHi Larson
I total agree that my first suggestion isn't what you want but I wanted to put the idea across that you can retrieve records from table in the order they were written using a simple SQL command.
When dealing with databases I always design my queries using Design View in MS Access. Once you have the query designed you can then convert the query you have just designed in Design View to SQL by changing to SQL View.
So this example SQL statement would return the MAX Timestamp.
SELECT Max(tblTimeStampTest.Timestamp) AS MaxOfTimestamp
FROM tblTimeStampTest;
Say the timestamp was 12/14/2005 8:18:33
SELECT tblTimeStampTest.*
FROM tblTimeStampTest
WHERE (((tblTimeStampTest.Timestamp)=#12/14/2005 8:18:33#));
This will return your last record as long at the timestamps are unique and records are written in timestamp order. You can then use Build Text Express VI or Format into String to build your SQL strings that have variables like the timestamp above.
I have no experience with mySQL but I would assume MS Access could interface to it somehow either through ODBC or MS Access Projects so that can build you SQL commands.
David
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